Cat Names starting with O| Male Cat Names - Female Cat Names - Unisex Cat Names |
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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
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| Name | Gender | Meaning | Class | Rating | Favorite |
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| Oakley | Male | | English | 2.6 | |
| Obelia | Unisex | pillar of strength | Greek | 5 | |
| Oblina | Female | | Cartoon | 3 | |
| Obsession | Unisex | A compulsive idea or emotion. | Fashion, Personality | 5 | |
| Ocelfa | Male | | English | 2.4 | |
| Ocho | Unisex | | Spanish, Mexican | 2.8 | |
| Octha | Male | | Arthurian Legend | 0.4 | |
| Ocvran | Male | | Arthurian Legend | 1.7 | |
| Odahingum | Female | | Native American | 2.3 | |
| Odanda | Female | | Spanish | 1.5 | |
| Odd Ball | Unisex | | Unusual | 0.5 | |
| Odede | Female | | Hebrew | 3 | |
| Odelette | Unisex | Little Song | French | 5 | |
| Odelia | Female | | Anglo-Saxon | 3.4 | |
| Odell | Male | | Irish | 3 | |
| Odelyn | Female | | Anglo-Saxon | 4.8 | |
| Odera | Unisex | plough | Hebrew | 5 | |
| Odessa | Unisex | odyssey, journey, voyage | Greek | 5 | |
| Odetta | Unisex | melody | French | 5 | |
| Odette | Female | happy home | Anglo-Saxon, French | 5 | |
| Odiana | Female | | German | 0.5 | |
| Odila | Female | | German | 2.6 | |
| Odin | Unisex | | Anglo-Saxon, Historical | 1.5 | |
| Odran | Male | | Irish | 4.9 | |
| Ody | Male | | Anglo-Saxon | 4.6 | |
| Oengus | Male | | Irish | 3.7 | |
| Officer | Unisex | A police officer or one who holds a commission rank the armed forces | Titles | 5 | |
| Ofra | Female | | Hebrew | 4.5 | |
| Ogelsby | Male | | English | 1.5 | |
| Ogilvie | Male | | Scottish | 3.8 | |
| Ohcumgache | Male | | Native American | 4.7 | |
| Oifa | Female | | Celtic | 2 | |
| Okeefe | Male | | Irish | 0.7 | |
| Okelani | Unisex | from heaven | Hawaiian | 5 | |
| OKimma | Female | | African | 2.8 | |
| Oksana | Unisex | glory be to God | Russian | 5 | |
| Old Bob | Male | | Unusual, Unique | 1.7 | |
| Oldwyn | Female | | English | 0.2 | |
| Oletha | Female | | English | 0.9 | |
| Olga | Unisex | holy | Russian | 5 | |
| Oliana | Unisex | oleander | Hawaiian | 5 | |
| Oliphant | Male | | Scottish | 3.8 | |
| Olive Oil | Female | | Cartoon | 1.5 | |
| Oliveria | Female | | Spanish | 1.1 | |
| Olivier | Male | | French | 0.7 | |
| Olwen | Female | | Celtic | 0.4 | |
| Olya | Female | | Russian | 0.1 | |
| Olympia | Unisex | of Mount Olympus, heavenly | Greek | 5 | |
| Oma | Female | | Arabic | 4 | |
| Omar | Male | First son, disciple; gifted speaker; famous | Hebrew, Arabic | 5 | |
| Omat | Female | | Irish | 2.8 | |
| Omeet | Male | | Hebrew | 3.9 | |
| Omega | Unisex | great | Greek | 5 | |
| Ominotago | Female | | Native American | 1.2 | |
| Ona | Female | | Hebrew | 4.3 | |
| Onilee | Female | | Native Ameracan | 2.8 | |
| Onslow | Male | | English | 1.3 | |
| Onyx | Unisex | A gemstone with bands of different colours. | Cute, Nature | 3.1 | |
| Oonagh | Female | | Irish | 1.7 | |
| Opal | Unisex | Australian gemstone of remarkable colours, usually red, blue or green | Nature | 5 | |
| Ophelia | Unisex | useful, wise | Greek | 5 | |
| Ophelie | Female | | French | 4.2 | |
| Ophira | Unisex | gold | Greek | 5 | |
| Opium | Unisex | A strong narcotic. | Fashion | 5 | |
| Oprah | Female | Fawn | Hebrew | 0.7 | |
| Ora | Female | | English | 1 | |
| Orabelle | Female | | English | 3 | |
| Orali | Female | | Hebrew | 2.1 | |
| Oran | Male | | Celtic | 1.3 | |
| Orane | Unisex | rising | French | 5 | |
| Orange | Unisex | Round citrus fruit originating in Southeast Asia. | Red | 5 | |
| Orbart | Male | | German | 0.4 | |
| Orcus | Male | | Cool, Greek, Roman | 3 | |
| Ordland | Male | | English | 3.9 | |
| Ordwald | Male | | English | 0.4 | |
| Orelia | Female | | English | 0.2 | |
| Oreo | Unisex | American cookie brand consisting of two chocolate wafers with white cream filling. | Foods | 5 | |
| Orford | Male | | English | 4.8 | |
| Ori | Male | | Hebrew | 3.6 | |
| Orick | Male | | English | 3.7 | |
| Orin | Male | | Celtic | 2.5 | |
| Orion | Unisex | A constellation. | Historical, Nature | 5 | |
| Orla | Female | | Irish | 1.3 | |
| Orlan | Male | | English | 4.2 | |
| Orland | Male | | German | 1.9 | |
| Orlege | Male | | Anglo-Saxon | 2 | |
| Orlin | Male | | Spanish | 4.5 | |
| Orman | Male | | English | 1.2 | |
| Ormond | Male | | English | 2.7 | |
| Oro | Male | | Spanish | 4.7 | |